package com.jee.support.enums;enum SecurityCategory {	STOCK(Security.Stock.class), BOND(Security.Bond.class);	Security[] values;	SecurityCategory(Class<? extends Security> kind) {		values = kind.getEnumConstants();	}	interface Security {		enum Stock implements Security {			SHORT, LONG, MARGIN		}		enum Bond implements Security {			MUNICIPAL, JUNK		}	}	public Security randomSelection() {		return Enums.random(values);	}	public static void main(String[] args) {		for (int i = 0; i < 10; i++) {			SecurityCategory category = Enums.random(SecurityCategory.class);			System.out.println(category + ": " + category.randomSelection());		}	}}